Block



F. B. MALLORY.

BLOCK.

APPLICATION FILED FEB. I1, 1920.

Patented Nov.' 23, 1920.

INVENTOR m., Y L E k m Mm mC mm UNITED sTAr-,es

rnnnERrcK B. MALLQRY, or PORTLAND, ortneroiv.

BLOCK.

Application led I|. `ebruaryl 17, Serial No.

To all whom t may concern.'

Be it known that I, FREDERICK B. MAL- LoRY, a citizen of the United States, residing ject being to provide a block of very simple at Portland, county of Multnomah, State of Ore on, have invented certain newk and useful mprovements in Blockaof which the *following `is a specification.

My invention relates to blocks in general, and particularly to rope or chain blocks as used in logging and like operations, the oband. ruggedconstruction the sides ofwhich "iaV are'bound together through the agency v,of

the sheave pin and having improved lubrication features. w

YI accomplish the above object by means of the construction illustrated in the accompanying drawing, which is a part of this application for Letters Patent, like characters pin is a plain cylindrical pin having upon each end thereof a dowel 6 integral with the pin, as shown in Fig. 2. Upon each end of said sheave pin is disposed a bushing 7 freely mounted upon the pin and having therein a plurality of slots 8 passing entirely through the body of the bushing, as shown in Fig. 3. v 4

.Said bushing 7 is freely mounted within a bushing 9 which latter bushing is secured within the hub 10 of the block side 11 in any convenient manner, preferably by making the bushing a press fit within said hub,as illustrated in Fi 2.l

,The bushing bronze while the bushing 9 is made of steel,

and the bushing 7 is rotatable both uponV the sheave pin 5 and within the bushing 9.

A suitable lubricant chamber 12 is formed within the block side 11, and anorilice 13 in the hub 10 registers with a similar orifice 14 in the bushing 9, thereby providing thatthe lubricant within the chamber 12 may come .by a Compression plugia u y screwed, into the block side 11 and" comis preferably made of Specification of Letters Patent. faijniidf NOV. 23, 1920.

into. contact with the bushing 7, fas shown in Fig. 2. T he bushing 7, by means of its slots 8 collects thislubricant .as said bushing rotates, andy thereby the lubricant is dis-iv tributed both to the .surfaces of contact VbesurfacesY of contact between the bushing 7 and thesheave pin. 5. Thelubricant used ymay be eitherY oil or grease, preferably the latter, andwhen grease is used a compression Ao ffthe .same sufficient to force it into thegrooves 8 of thelou'shing 7 ispro'vided Said plug `is municates with the 'interior' of the 'lubricant tween thel bushings 7 Aand 9 and also to the f chamber 12, 'pandis provided with afslidablev head or diaphragm 1'6.actuatedbya spring 17 intermediate said. head andtheA closed end ffTo secure -thefblockv's'ides y11 together in their relative positions, usingv thesheave pin v5`as the 'securing' member, I provide upon each end of said sheave pin a collar 18 of suiiicient diameter to engage with the vsurface `of the hub 10 of the block side, as

shown in Fig. 2, said collar being centered upon the dowel 6 of said sheave pin, and secured to the latter by suitable bolts 19. A ball 20 is interposed between the block side cap 21 and the collar 18,'a suitable bearing cap, and said cap being secured to the respective block side by suitable bolts 23. By this construction all relative longitudinal movement of the sheave piny 5 and the block side 11 is prevented.

p To prevent escape of the lubricant around the sheave pin 5 I provide within a counterbore in the inner endof the hub 10 a yieldvable collar, 24, preferably of felt or the like, kpressed upon the sheave pin by a plural-A ity of springs`25'and secured in place within said counterbore by a cap'26. p

My device may be made of any size, and constructed of any materials deemed convenientV and suitable for a device of this character, andvwhile I have illustrated and described a form of construction and arrangement of parts found desirable in materializing my invention, I wish to include in this application for Letters Patent all mechanical equivalents or substitutes that soy may fairly be considered to come within the Y scope and purview of my invention as de- Y ned in the appended claims.

e5 Y plate 22 for said ball being provided in said y i Having disclosed my invention so that others may be enabled to construct and to use the same, what `I claim as new and desire to secure by Letters Patent is:

1. In a block side, a sheave; a sheave pin secured to said slieave; a pair of block sides; a cap 'secured to each of Vsaid block sides adjacentvto the respective end of said sheave pin; a collar secured -upon each end of said sheave pin and contacting with the hub of the respective block side;V anda ball intermediate each of said 'collars'and the respective of said caps. f

2. In a block, a sheave; a sheaveV pin secured to said sheave; a pair ofblock sides; a cap secured to each of saidV block sides adjacent to the respective end of said sheave pin; and means intermediate said cap and the hub of said block side respective thereto and mounted upon the .end of said sheave pin to secure said sheave pin from longitudinal movement within the Vrespective of said block sides.

3. In ay block, a sheave; a sheave pin secured thereto; a vpair of block sides, each containing a lubricant chamber; a bushing secured within the hub of each of said block sides; a bushing mounted upon each of the journalsV of said sheave pin, and rotatable both upon said journal and Within saidrst mentioned bushing; each of said bushings having orifices therein communicating with said lubricant chamber. 1

- V- Ll. In a block, a sheave, a sheave pin secured thereto, and a block side, in'kcombination with a pair of concentric bushings mounted upon the journal of said sheave pin, the outer bushing being secured within its respective block side, and the inner b ushi ing Vbeing rotatable within said outer bushing and upon said sheave pin; means to lubrcate Vboth the outer and inner surfaces of said rotatable bushing; and means mounted upon the end of said sheave pinto secure the same from longitudinal movement within said block side;

5. A lblocl side,` alcap pin and a sheave secured thereon, inrcombination with Y means lmounted upon :said sheave pin intermediate saidl block side and said cap to secure said sheave pin from lon gitudinal movement'within saidblock Side.

In witness whereof I claim the-foregoing as my own I hereuntoraiiixrmy signature in the presence' of two witnesses, vat Portland,

Vitnesses: n Y Y C. F. BLAKE,

L. J. ROBINSON.k

thereto, a sheave i county of Multnomah, Starte ofQregon, this 

